Imaging

Stereoscopic Planar Laser-Induced Fluorescence Imaging for Time-Resolved 3D Movies in Hypersonic Flow

This technique may be useful in applications where time-resolved visualization of unsteady, high-speed flows is needed, such as detonations, supersonic combustion systems, and explosions. Langley Research Center, Hampton, Virginia Understanding and predicting transition from laminar to turbulent flow in hypersonic boundary layers is an active and important field of research because transitional and turbulent heating can be four or more times higher than laminar heating on hypersonic vehicles, including the Orion Crew Exploration Vehicle (CEV).

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Modified-Wolter-Schwarzschild X-ray Telescope

Goddard Space Flight Center, Greenbelt, Maryland X-ray survey missions require nested grazing incidence telescopes with a large field of view (1° or larger) and moderately high resolution across the field of view. This cannot be accomplished using flat focal plane detectors. The telescopes have excellent on-axis resolution, but unacceptable resolution at the edge of the field of view. The aberrations need to be optimized and correctly balanced to improve the telescope optical performance across the field of view.

Posted in: Briefs, TSP, Imaging

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Machine Vision-Based Pose Estimation System

This system uses ellipse detection for spacecraft autonomous rendezvous and docking (AR&D). Goddard Space Flight Center, Greenbelt, Maryland During on-orbit servicing of non-cooperative satellites, the relative position of the satellite with respect to the servicing vehicle is needed. Non-cooperative satellites do not have devices to assist the pose estimation (such as markers or reflector), so a system that uses the natural features of the satellite to determine its pose needs to be developed.

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Solar Doppler Shift-Based Solar Tracker

Potential applications may be in terrestrial solar thermal collectors. NASA’s Jet Propulsion Laboratory, Pasadena, California This solar tracker integrates a camera with a field of view (FOV) large enough to easily image the entire solar disc — co-boresited with a narrow-band spectrometer that measures the frequency of a Doppler shifted line — with an algorithm designed to drive zero Doppler shift rotation axis of the Sun.

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Beam Shaping for CARS Measurements in Turbulent Environments

This approach obtains more reliable quantitative measurements in a scramjet engine. Langley Research Center, Hampton, Virginia Taking measurements in a scramjet engine is particularly challenging because of the harsh testing environment. Any probe inserted in the flow would generate shock waves, strongly perturbing the flow. Coherent Anti-Stokes Raman spectroscopy (CARS) is a non-intrusive laser-based measurement technique that has been implemented successfully to measure temperature and species concentrations in ducted scramjet engines.

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Area-Scan Camera

The Basler beat area-scan camera from Basler (Ahrensburg, Germany/ Exton, PA) features 12 MP of resolution, progressive scan, and global shutter technology. Using the Camera Link interface, the cameras process 62 frames per second. Possible applications include measurement and identification; semiconductor and electronics manufacturing; license plate identification; and fluorescence microscopy. Basler’s free pylon Camera Software Suite, based on the GenICam standard, works with the Basler beat series. The software suite provides access to all functions and optimal operation of the camera.

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Area-Scan Camera

The SAPPHIRE S-25A70/CXP area-scan camera from Adimec (Eindhoven, the Netherlands/Stoneham, MA) is equipped with the CoaXPress V1.1 Quad interface (4 x CXP-6). CoaXPress CXP-6 Quad offers a peak transfer rate of 2 Gigapixels/s. Data transmission between the camera and frame grabber occurs at up to 25 Gbits/s (4 x 6.25 Gbits/s). The S-25A70/CXP camera utilizes the ON Semiconductor Vita25k global shutter image sensor. Additionally, the 25-Megapixel CMOS global shutter device delivers images of 5120 x 5120 pixels at a maximum of 73 full frames per second (fps). A defect pixel correction algorithm maintains image uniformity. At maximum speed, cable lengths over 30 meters are supported without the need for signal repeaters.

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CMOS Camera

The Imaging Source (Bremen, Germany/Charlotte, NC) has announced industrial cameras with the Sony Full HD WDR Sensor IMX236. The cameras are available as GigE (PoE) and USB 3 versions in monochrome and color. Other features include integrated WDR (Wide Dynamic Range) and a resolution from VGA to Full HD. The maximum frames-per-second at Full HD is 60 fps; 145 fps is possible at VGA resolution. All cameras are shipped with drivers for LabView, HALCON, MERLIC, VisionPro, DirectX, Twain, and NeuroCheck. End-user applications; an SDK consisting of .NET and ActiveX components; and a C++ class library are included. The cameras also ship with IC Capture, end-user software to set all camera parameters.

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High-Speed Camera

Photron (San Diego, CA) has released the FASTCAM Mini WX 50 camera. The device provides up to 750 frames per second at full four-megapixel resolution; 1080 HD performance is achieved at 1,500 frames per second. The 120 x 120 x 99-mm Mini WX 50 weighs 3.5 lbs and features 12-bit ADC. Memory options range from 4 GB to 8 GB, and up to 16 GB with Gigabit Ethernet interface capability. Light sensitivity is measured to the ISO Ssat 12232 standard: ISO 6,400 monochrome and ISO 2,000 color. The high-speed cameras also feature Fmount and C-mount lens mounts.

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Infrared Camera

The Goldeye G-008 SWIR camera from Allied Vision Technologies (Stadtroda, Germany/Exton, PA) is fitted with a QVGA InGaAs sensor (320 x 256 pixels, 30 μm pixel size), making the camera sensitive in the short wave infrared spectrum ranging from 900 to 1,700 nm. The imager delivers 346 frames per second at full resolution. The industrial-grade housing measures 55 x 55 x 78 mm, and the camera uses the GigE Vision industrial standard as an interface. GenICam is compatible with image processing libraries. The Goldeye G-008 SWIR also features image correction and optimization functionalities, such as algorithms, a fan-less sensor, and a thermoelectric module (TEC 1) for low-noise images. For Free Info Visit http://info.hotims.com/55593-144

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